References that employers trust for the most accurate reporting include

a.) friends
b.) relatives
c.) counselors
d.) parents

counselor  (C)

Explanation: Out of all the options the best and hones reference can be given by a counselor because most of the times family and friends cannot give a 100% honest opinion and also because they cannot give an objective view of the persons work history. If the reference is given from a professional relationship, it is considered to be more trustworthy and considerate. A reference from a counselor can effectively attest to your work ethic

accelerated heartbeat, raise in blood pressure, slow in digestion, raise in blood sugar and perspiration. (myers' psychology for ap 2nd edition pg 87)